If your remote panels/switches are ONAN items than yes you can buy the switch from Cummins-Onan or from some other suppliers.
It usually has one connector with all wires and only goes one way with a plastic retainer. Wall plate has to be pulled out.
Here is a link to the part number and a picture of the typical Onan switch.
Some were amber, but most now are red....
https://www.amazon.com/Onan-Cummins-...0BGSSXH7AZ38M7